If I am correct...the "looseness" your feeing is the active head restraint system...it is to help prevent "whiplash" in incase of an accident...
EDIT*
Here is a link 
http://www.edmunds.com/ownership/saf...2/article.html
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-Mike-
2007 San Marino Blue 350Z
Last edited by nismoflip6; 01-28-2009 at 06:06 PM.
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